APA (7th ed.) Citation

Bernstein. (2003). US army AH-1 cobra units in Vietnam. Osprey Publishing.

Chicago Style (17th ed.) Citation

Bernstein. US Army AH-1 Cobra Units in Vietnam. Oxford: Osprey Publishing, 2003.

MLA (8th ed.) Citation

Bernstein. US Army AH-1 Cobra Units in Vietnam. Osprey Publishing, 2003.

Warning: These citations may not always be 100% accurate.